| Year | Count |
|---|---|
| 1921 | 5 |
| 1940 | 11 |
| 1942 | 20 |
| 1945 | 5 |
| 1947 | 15 |
| 1949 | 5 |
| 1969 | 5 |
| 1970 | 16 |
| 1977 | 5 |
| 1981 | 5 |
| 1982 | 18 |
| 1983 | 5 |
| 1986 | 5 |
| 1989 | 11 |
| 1990 | 11 |
| 1991 | 5 |
| 1992 | 15 |
| 1993 | 29 |
| 1994 | 18 |
| 1995 | 13 |
| 1996 | 30 |
| 1997 | 11 |
| 1998 | 11 |
| 1999 | 20 |
| 2000 | 15 |
| 2002 | 28 |
| 2003 | 10 |
| 2004 | 5 |
| 2005 | 26 |
| 2006 | 16 |
| 2008 | 11 |
| 2009 | 5 |
| 2011 | 15 |
| 2012 | 12 |
| 2013 | 25 |
| 2014 | 51 |
| 2015 | 63 |
| 2016 | 74 |
| 2017 | 62 |
| 2018 | 7 |
| 2019 | 23 |
| 2020 | 8 |
| 2021 | 15 |
| 2022 | 22 |
| 2023 | 13 |
| 2024 | 21 |